FIELD: metallurgy.
SUBSTANCE: procedure consists in mixing powders of oxides of lanthanum, gallium and tantalate with grain of granulometric dimension in range of 1-5 mcm, in successive heating produced powder-like mixture with controlled rate to temperature of sintering and in conditioning said mixture at this temperature till sintering process is completed. Also, sintering powder-like mixture of oxides is carried out in two stages, so that at the first stage heating from ambient temperature to sintering temperature T1 in the range 1300-1350°C is performed at rate 120-125 degr/hour and conditioned at this sintering temperature during 2.5-3.0 hours with formation of intermediate compounds of LaGaO3, LaTaO4 formula; while at the second stage heating is performed from temperature of sintering T1 to temperature T2 within the range 1440-1450°C at rate 150-155 degr/hour; mixture is conditioned during 3.5-4.4 hours till completion of sintering process forming stoichiometric compound of lanthanum-gallium tantalate La3Ga5,5Ta0,5O14.
EFFECT: lowered temperature of sintering, increased service life of alundum containers for their repeated usage, simplified instrumentation for process.
2 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SOLID-PHASE SYNTHESIS OF MIXTURE FOR GROWING OF SINGLE CRYSTALS OF LANTHANUM-GALLIUM TANTALATE (LaGaTaO) | 2000 |
|
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| METHOD OF SOLID-PHASE SYNTHESIS OF CHARGE FOR GROWING MONOCRYSTALS OF LANTHANUM GALLIC SILICATE | 1998 |
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| MONOCRYSTAL WITH CALCIUM GALLOGERMANATE STRUCTURE FOR MANUFACTURE OF DISKS IN DEVICES ON SURFACE-ACOUSTIC WAVES AND METHOD OF PRODUCTION OF SUCH CRYSTAL | 2003 |
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| METHOD OF SOLID-PHASE SYNTHESIS OF MIXTURE FOR GROWING OF SINGLE CRYSTALS OF LANTHANUM-GALLIUM NIOBATE (LaGaNbO) | 2000 |
|
RU2160796C1 |
| METHOD OF PREPARING CHARGE FOR GROWING LANTHANUM-GALLIUM SILICATE MONOCRYSTALS | 1998 |
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RU2156326C2 |
| METHOD OF PRODUCING MIXTURE FOR GROWING OF SINGLE CRYSTALS OF LANTHANUM-GALLIUM SILICATE | 1996 |
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RU2126063C1 |
| METHOD FOR PRODUCING OF BATCH FOR GROWTH OF SINGLE CRYSTAL STRONG-NIGACITE AND STRONTANGACITE WITH CALCIUM GALLOGERMANATE STRUCTURE | 2003 |
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| PROCESS OF PREPARATION OF MIXTURE TO GROW MONOCRYSTALS OF GALLOSILICATES WITH STRUCTURE OF CALCIUM GALLOGERMANATE | 2001 |
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RU2194808C1 |
